1 ETF With a 31% Allocation to SpaceX

Space Exploration Technologies (SPCX 0.97%), better known as SpaceX, is one of the hottest initial public offerings (IPOs) ever. So it's not surprising that both investors and fund managers are scrambling to get their hands on shares.

Some of the professionals take that desire to extremes. Most index funds have rules that govern how quickly they can add IPO shares and how much they can buy. Actively managed funds don't have those constraints. That means managers can take big home run swings quickly if they choose.

The Baron First Principles ETF (RONB +0.47%) is one such fund. Its legendary head portfolio manager, Ron Baron, has put a massive 31% of the fund's assets in SpaceX, easily the largest allocation made to this stock in any ETF (exchange-traded fund).

The fund invests in what the company calls "first principles" businesses, those considered innovative companies pursuing large, disruptive opportunities. SpaceX certainly fits the bill. But the big question at this allocation is how much is too much.

I'm not sure this is ultimately about investment strategy as much as it is about grabbing assets. Prior to SpaceX's IPO, investors were looking for any means possible to get access to shares in the private markets. The Baron First Principles ETF offered that. By ratcheting up the exposure, it offered investors what few could -- a sizable allocation to SpaceX.

While that might be appealing to investors, it's not a sound strategy for the fund. By taking such a significant position in a single company, it runs the risk of a deep drawdown and heightened volatility should investors decide that valuation, company execution, or financial performance is questionable.

The fund's lack of diversification means it doesn't belong in the core of a portfolio. The short operating history means investors don't have a good handle on how the fund will perform in different economic cycles, either.

It all makes for an interesting ETF story, but not so much a long-term investment.